WO2009055984A1 - Système reseau a acces multiple à répartition en longueur d'onde et procédé associé - Google Patents

Système reseau a acces multiple à répartition en longueur d'onde et procédé associé Download PDF

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Publication number
WO2009055984A1
WO2009055984A1 PCT/CN2007/003746 CN2007003746W WO2009055984A1 WO 2009055984 A1 WO2009055984 A1 WO 2009055984A1 CN 2007003746 W CN2007003746 W CN 2007003746W WO 2009055984 A1 WO2009055984 A1 WO 2009055984A1
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WO
WIPO (PCT)
Prior art keywords
module
remote node
node device
access network
xpon
Prior art date
Application number
PCT/CN2007/003746
Other languages
English (en)
Chinese (zh)
Inventor
Lairong Luo
Taili Wang
Original Assignee
Zte Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zte Corporation filed Critical Zte Corporation
Publication of WO2009055984A1 publication Critical patent/WO2009055984A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0278—WDM optical network architectures
    • H04J14/0282—WDM tree architectures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J14/0245—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU
    • H04J14/0246—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU using one wavelength per ONU
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J14/0245—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU
    • H04J14/0247—Sharing one wavelength for at least a group of ONUs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J14/0249—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU
    • H04J14/025—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU using one wavelength per ONU, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J14/0249—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU
    • H04J14/0252—Sharing one wavelength for at least a group of ONUs, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0226—Fixed carrier allocation, e.g. according to service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0086—Network resource allocation, dimensioning or optimisation

Definitions

  • the present invention relates to a novel WDM (Wavelength Division Multiplexing) access network system in the field of communication technology.
  • WDM Widelength Division Multiplexing
  • the access network is the basic platform for the landing and development of various services. Broadband and continuous eliminability will be the key to the construction of access networks. The downward movement of network optical nodes and the retreat of optical access are a gradual and unresolved trend. Also appeared for this? Ding down series concept Ding Ding refers to fiber to exchange? 3 ⁇ 461* ⁇ 0 111 ⁇ 2 Cabinet; FTTCab, fiber to the roadside Fiber To The Curb; FTTC, fiber to the building Fiber To The Building; FTTB and fiber to the home Fiber To The Home; FTTH).
  • PON Passive Optical Network
  • PON Passive Optical Network
  • ATM-PON abbreviation for ATM-PON
  • EPON Ethernet passive light
  • GPON Gigabit Passive Optical Network
  • the existing xPON system structure in the access network consists of the optical path terminal (OLT) of the central office, the passive splitter (splitter) close to the user side, and the optical network unit (ONU) of the user. composition.
  • the branch ratio of the passive splitter splitter is inversely proportional to the distance between the ONU and the OLT.
  • the maximum branch ratio is 128, and the common branch ratio is 16 and 32.
  • the existing PON access system has some shortcomings, mainly reflected in:
  • the number of customer access is limited, and the bandwidth resources of the fiber are not fully utilized, and it is not suitable for the area where the user is dense (the number of users exceeds 128).
  • OLT optical transmission network
  • client ONU transmission distance 100km
  • OLT maximum use More than 1000 users, each user bandwidth peak value of 100Mb / s, support downlink rate up to 10Gb / s, up to 2.5Gb / s.
  • the existing optical broadband access network cannot meet customer needs and, therefore, needs to be improved.
  • the technical problem to be solved by the present invention is to provide a novel WDM access network system, which overcomes the shortcomings of the existing FTTX network access capacity and limited transmission distance, and enables the system structure to extend the transmission distance of the system and expand the OLT access. Number of ONU users.
  • the present invention provides a wavelength division multiplexing access network system, including a user optical network unit xPON ONU of a plurality of passive optical networks, and at least one passive splitter connected to a plurality of xPON ONUs,
  • the method further includes: a central device, and a remote node device, wherein the central device is connected to the remote node device by using a transmission fiber;
  • the central device includes a central optical path terminal xPON OLT of a plurality of passive optical networks, and a first combining/demultiplexing module connected to the plurality of xPON OLTs;
  • the remote node device includes a second multiplexer/demultiplexer module, and the multiple outputs of the second multiplexer module are connected to the passive splitters through optical fibers.
  • the wavelength division multiplexing access network system of the present invention wherein the central device further includes a first bidirectional optical amplifier, one end of which is connected to the first combining/demultiplexing module, and the other end is connected to the optical fiber and the optical fiber.
  • the remote node device is connected.
  • the wavelength division multiplexing access network system of the present invention wherein the central device further comprises a bidirectional optical amplification and dispersion compensation function module, one end of which is connected to the first combining/demultiplexing module, and the other end is transmitted through The optical fiber is connected to the remote node device.
  • the remote node device further includes a bidirectional optical amplification and dispersion compensation function module, one end of which is connected to the second multiplexer/demultiplexer module, and the other end is connected to the central device through a transmission optical fiber.
  • the remote node device further includes a second bidirectional optical amplifier, one end of which is connected to the second multiplexer/demultiplexer module, and the other end of which is connected to the central device through a transmission optical fiber.
  • the wavelength division multiplexing access network system wherein the xPON ONU in the system
  • the user is an optical network unit GPON ONU of a gigabit passive optical network
  • the central device includes a plurality of GPON OLTs, a first combining/demultiplexing module connected to the plurality of GPON OLTs, and a bidirectional optical amplification and dispersion compensation function module, one end of which is coupled to the first combining/demultiplexing module Connected to the other end and connected to the remote node device through a transmission fiber;
  • the remote node device includes a second multiplexer/demultiplexer module, and the multiple outputs of the second multiplexer/split module are connected to the passive splitters through optical fibers.
  • the remote node device further includes a second bidirectional optical amplifier, one end of which is connected to the second multiplexer/demultiplexer module, and the other end of which is connected to the central device through a transmission optical fiber.
  • the first multiplexer/demultiplexer module employs a heating type periodic arrayed waveguide grating block
  • the second multiplexer/demultiplexer module employs a heating type periodic arrayed waveguide grating module.
  • the wavelength division multiplexing access network system wherein when the xPON ONU in the system is the user optical network unit EPON ONU of the Ethernet passive optical network,
  • the central device includes a plurality of EPON OLTs, a first combining/demultiplexing module connected to the plurality of EPON OLTs, and a bidirectional optical amplifier, one end of which is connected to the first combining/dividing module, and the other end is passed
  • the transmission fiber is connected to the remote node device;
  • the remote node device includes a second multiplexer/demultiplexer module, and the multiple outputs of the second multiplexer/split module are connected to the passive splitters through optical fibers.
  • the first multiplexer/demultiplexer module uses a heating type periodic arrayed waveguide grating module
  • the second multiplexer/demultiplexer module uses a non-heated periodic arrayed waveguide grating module.
  • the invention has the beneficial effects that: by adopting technologies such as WDM, bidirectional optical amplifier, dispersion compensation, etc., the access system according to the present invention can smoothly upgrade the system capacity, increase the transmission distance of the original xPON system, and transmit the single wavelength.
  • the downlink can reach 10Gb/s and the uplink can reach 2.5Gb/s, which can solve the growing customer demand.
  • the WDM access network system of the present invention can completely adopt the xPON OLT and the xPON ONU in the original xPON system structure, and the cost of implementing the system transformation is low.
  • FIG. 1 is a schematic structural view of a prior art xPON system
  • FIG. 2 is a schematic structural diagram of a WDM (Wavelength Division Multiplexing) access network system according to the present invention
  • 3 is a schematic structural diagram of a first embodiment of a WDM (Wavelength Division Multiple Access) access network system according to the present invention
  • FIG. 4 is a schematic structural diagram of a second embodiment of a WDM (Wavelength Division Multiple Access) access network system according to the present invention.
  • the present invention will be WDM
  • PON passive optical network
  • the WDM access network system of the present invention is shown in FIG. 2.
  • the entire WDM access network system structure comprises four parts: a central device (Central Office device), a remote node device (Remote Node device), and multiple Spilter on the client side. And multiple users xPON ONU.
  • the Central Office device is composed of a plurality of xPON OLT function modules, a first multiplexer/demultiplexer module (MUX/DEMUX module 1), a bidirectional optical amplification and a dispersion compensation function module, wherein the first multiplex wave/minute One end of the wave module is connected to the plurality of xPON OLT function modules, and the other end is connected to the first bidirectional optical amplification and dispersion compensation function module;
  • the remote node (Remote Node) is composed of a second bidirectional optical amplifier and a dispersion compensation function module and a second a multiplexer/demultiplexer module (MUX/DEMUX module 2), and the first optical amplification and dispersion compensation function module in the central device is connected to the second bidirectional optical amplifier in the remote node device through an X km transmission fiber
  • the dispersion compensation function module the multi-output of the MUX/DEMUX module 2 in the remote node device is connected to each passive branch through the y km
  • the working principle of the entire WDM access network system is as follows: the downlink service of the central office enters the MUX/DEMUX module 1 through the output of n xPON OLT function modules, and the MUX/DEMUX module 1 combines the n wavelength signals output by the n xPON OLTs/ After splitting, the output enters the bidirectional optical amplifier and dispersion compensation module 1. After amplification and dispersion compensation, it enters the X km transmission fiber; after the x km fiber transmission, it is carried out at the remote node Remote Node bidirectional optical amplifier and dispersion compensation module 2.
  • the MUX/DEMUX module 2 splits into n wavelength signals and then transmits the y km fiber to the passive branch splitter near the client side into m paths and then enters the ONUs of m users. Assuming that the split ratio of each splitter is m, the number of users that can be accessed by each xPON OLT It is m, so the total capacity of the system is mn users. The corresponding uplink signal is similarly reversed. Since the uplink and downlink services of each ONU are transmitted on the same fiber, each ONU and OLT need to couple their uplink and downlink services into the same fiber.
  • the MUX/DEMUX module 1 in the device and the MUX/DEMUX module 2 of the Remote Node device need to have bidirectional multiplexed wave processing.
  • the bidirectional optical amplification and dispersion compensation function module 2 of the remote node device may select a joyous direction.
  • the optical amplifier is replaced or the bidirectional optical amplifier function module is not used.
  • the remote node device only includes the MUX/DEMUX module 2.
  • the present invention adopts the MUX/DEMUX function module and the bidirectional optical amplification and dispersion compensation module, the key technologies used in the xPON system are burst transmission and reception mode and bandwidth allocation DBA due to optical domain transparency.
  • Technology, ranging technology, security encryption technology, protection technology, PLOAM information technology and GEM-GPON Encapsulation Method are not changed.
  • the WDM access network system structure proposed by the present invention can almost completely adopt the xPON OLT and the xPON ONU in the original xPON system structure.
  • a first embodiment of the present invention uses a GPON OLT function module on the central office side (central device), and the functional module is functionally divided into a downlink transmission processing portion and an uplink reception processing portion, and a downlink transmission wavelength and uplink reception.
  • the wavelength uses a coupler to couple the signals together into a 32ch cyclic AWG (periodic arrayed waveguide grating).
  • the central office also uses a bidirectional optical amplification and dispersion compensation function module.
  • the circulator separates the Han direction signals, and the downlink signal and the uplink signal are subjected to dispersion pre-compensation and then amplified, and then the bidirectional signals are combined by the circulator.
  • the Remote Node node requires a bidirectional optical amplifier due to its high receiving sensitivity of 10Gb/s, so that a low-cost heated Cyclic AWG can be used, but if the central office (central device) is far to the far end When the node distance is short, the bidirectional optical amplifier of the remote node may not be needed, so that the remote node can only use Athermal Cyclic AWG (unheated periodic arrayed waveguide grating), which can reduce the environmental requirements.
  • Athermal Cyclic AWG unheated periodic arrayed waveguide grating
  • the ONU on the user side performs almost the opposite function to the OLT.
  • the splitter adopts a 32-branch ratio
  • the highest support The downstream single wavelength rate will reach 10Gb/s.
  • the second embodiment of the present invention is as shown in FIG. 4, and the EPON OLT function module is used on the central office side. Since the current maximum signal rate of the EPON is 2.5 Gb/s, the central office only uses the bidirectional optical amplifier function module, and the dispersion compensation module may not be needed. . Due to the low sensitivity of the 2.5Gb/s optical receiver, the remote node device does not need to use an optical amplifier for most transmission distance applications.
  • the invention adopts WDM, bidirectional optical amplifier, dispersion compensation and other technologies, can smoothly upgrade the system capacity, increase the transmission distance of the original xPON system, and the single wavelength transmission rate can reach 10Gb/s down, and the uplink can reach 2.5Gb/ s, to address growing customer demand.
  • the WDM access network system of the present invention can completely adopt the xPON OLT and the xPON ONU in the original xPON system structure, and the cost of system transformation is low.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

L'invention concerne un système de réseau d'accès à multiplexage en longueur d'onde (WDM), qui comporte plusieurs utilisateurs xPON ONU, et au moins un séparateur passif relié à plusieurs utilisateurs xPON ONU, ainsi qu'un dispositif central et un dispositif de noeud distant. Le dispositif central est relié au dispositif de noeud distant par le biais d'une fibre optique de transmission, le dispositif central comportant plusieurs xPON OLT, le premier module MUX/DEMUX relié à plusieurs xPON OLT, et le premier amplificateur optique bidirectionnel relié au module MUX/DEMUX; le dispositif de noeud distant comporte le second module MUX/DEMUX, et les sorties multiplex du dispositif de noeud distant sont reliées à tous les séparateurs passifs par fibre optique. L'invention concerne la technique WDM introduite dans la structure de système PON, ce qui permet de niveler en douceur la capacité du système, d'étendre la distance de transmission du système xPON existant, et de résoudre l'exigence en expansion de l'utilisateur.
PCT/CN2007/003746 2007-10-31 2007-12-24 Système reseau a acces multiple à répartition en longueur d'onde et procédé associé WO2009055984A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 200710124353 CN101425867B (zh) 2007-10-31 2007-10-31 一种wdm接入网系统
CN200710124353.2 2007-10-31

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Publication Number Publication Date
WO2009055984A1 true WO2009055984A1 (fr) 2009-05-07

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EP2333991A1 (fr) * 2009-12-11 2011-06-15 Alcatel Lucent Amplificateur optique bidirectionnel

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CN101959091B (zh) * 2009-07-15 2013-12-18 华为技术有限公司 一种数据传输方法、系统以及运营商边缘节点
CN102480651B (zh) * 2010-11-23 2015-07-22 中兴通讯股份有限公司 多速率光信号传输方法、系统及光网络单元
CN103220044B (zh) * 2012-01-19 2015-12-16 中兴通讯股份有限公司 一种光接入网络系统、设备及方法
CN103178904B (zh) * 2013-03-26 2016-12-28 华中科技大学 全双工高速单纤双向波分复用无源光接入网络
CN104980369A (zh) * 2014-04-08 2015-10-14 国家电网公司 智能变电站过程层多波长隔离光交换机设备及其实现方法
CN104735556B (zh) * 2015-03-27 2019-07-05 上海欣诺通信技术有限公司 一种g/epon双模链路放大器及其控制方法
CN109982171B (zh) * 2019-03-20 2021-11-02 东南大学 一种可拉远多跳光接入网及智能管理系统

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WO2011070163A1 (fr) * 2009-12-11 2011-06-16 Alcatel Lucent Amplificateur optique bidirectionnel
US8848284B2 (en) 2009-12-11 2014-09-30 Alcatel Lucent Bidirectional optical amplifier

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